The basic forms of sulfate attack are the following: The reactive aluminates in the cement will react with the gypsum in cement during hydration. This process is harmless as the ettringite does not produce expansive forces and is stable in sulfate solutions. If the quantity of reactive aluminates in the cement is too high, then their hydrate form...

We are often used together with silica fume and concrete. When it is in concrete, it acts as a cementing material and as a filler. Small silica fume particles fill spaces between cement particles and past a cement base and aggregation between the particles. The combination of silica fume also the formation of pozzolanic reaction, by increasing the...